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06:07
Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
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Targeted systematic evolution of an RNA platform neutralizing DNMT1 function and controlling DNA methylation
Carla L Esposito1, Ida Autiero2,3, Annamaria Sandomenico3
1Institute for Experimental Endocrinology and Oncology "Gaetano Salvatore" (IEOS), CNR, Naples, 80100, Italy. c.esposito@ieos.cnr.it.
Nature Communications
|January 7, 2023
Summary
Scientists developed aptaDiR, a novel RNA-based therapy targeting DNA methylation in cancer. This approach offers a precise alternative to current treatments, reducing side effects and improving tumor control.
Area of Science:
- Epigenetics
- Molecular Biology
- RNA Therapeutics
Background:
- DNA methylation is a key epigenetic regulator of gene expression.
- Aberrant DNA methylation is prevalent in cancer, driving tumorigenesis.
- Current demethylating drugs lack specificity, leading to significant toxicities.
Purpose of the Study:
- To develop a targeted DNA demethylation strategy for cancer therapy.
- To create a novel RNA-based therapeutic approach to inhibit DNMT1 activity.
- To overcome the limitations of non-specific hypomethylating agents.
Main Methods:
- Integration of DNMT1 interacting RNA (DiR) and RNA aptamer technology.
- Molecular modeling of RNA-DNMT1 complexes.
- Biochemical and cellular assays for aptaDiR characterization.
- In vivo studies to assess anti-tumor efficacy.
Main Results:
- Successfully generated aptaDiR, a first-in-class DNMT1-targeted RNA bio-drug.
- aptaDiR effectively blocks DNA methylation.
- Demonstrated impairment of cancer cell viability and inhibition of tumor growth in vivo.
Conclusions:
- aptaDiR represents an innovative RNA-based strategy for modulating DNMT1 in diseases with aberrant DNA methylation.
- This approach offers a promising alternative to current non-specific hypomethylating treatments.
- The findings suggest a significant improvement for clinical intervention in DNA methylation-related disorders.
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